Change codes in chart of accounts

Hi, I have inherited a messy coding system in my chart of accounts as a result of the JET convert process from Quickbooks.

I would like to edit all my accounts in the chart of accounts and give them meaningful codes but am concerned that it will mess up any linked accounts, eg. payroll items are linked to accounts and so are organisational settings and payroll settings.

Will I have to relink all payroll items and linked accounts, or will it flow as it was and just show the new code I allocate??